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TPC-660G User Manual 48
Appendix C Watchdog Timer Program-
ming on WinCE
There is a built-in watchdog timer in Windows CE 4.2 for TPC-660G.
You can access it through the WIN32 API. TPC-660G provides a WDT
driver to allow users to enable/disable the watchdog timer. The driver
name is “WDT1:”. Programmers must open this driver before using the
resources. Then programmers can use DeviceIOControl functions to
enable/disable the watchdog timer. The introduction below includes
DeviceIOControl, the definition of the parameter and an example.
C.1 DeviceIOControl
This function sends a control code directly to a specified device driver,
causing the corresponding device to perform the specified operation.
BOOL DeviceIoControl(
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped );